2 * Copyright (c) 2016 Intel Corporation
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5 * documentation for any purpose is hereby granted without fee, provided that
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23 #ifndef __DRM_CONNECTOR_H__
24 #define __DRM_CONNECTOR_H__
26 #include <linux/list.h>
27 #include <linux/llist.h>
28 #include <linux/ctype.h>
29 #include <linux/hdmi.h>
30 #include <drm/drm_mode_object.h>
31 #include <drm/drm_util.h>
33 #include <uapi/drm/drm_mode.h>
35 struct drm_connector_helper_funcs;
36 struct drm_modeset_acquire_ctx;
41 struct drm_property_blob;
45 enum drm_connector_force {
46 DRM_FORCE_UNSPECIFIED,
48 DRM_FORCE_ON, /* force on analog part normally */
49 DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
53 * enum drm_connector_status - status for a &drm_connector
55 * This enum is used to track the connector status. There are no separate
56 * #defines for the uapi!
58 enum drm_connector_status {
60 * @connector_status_connected: The connector is definitely connected to
61 * a sink device, and can be enabled.
63 connector_status_connected = 1,
65 * @connector_status_disconnected: The connector isn't connected to a
66 * sink device which can be autodetect. For digital outputs like DP or
67 * HDMI (which can be realiable probed) this means there's really
68 * nothing there. It is driver-dependent whether a connector with this
69 * status can be lit up or not.
71 connector_status_disconnected = 2,
73 * @connector_status_unknown: The connector's status could not be
74 * reliably detected. This happens when probing would either cause
75 * flicker (like load-detection when the connector is in use), or when a
76 * hardware resource isn't available (like when load-detection needs a
77 * free CRTC). It should be possible to light up the connector with one
78 * of the listed fallback modes. For default configuration userspace
79 * should only try to light up connectors with unknown status when
80 * there's not connector with @connector_status_connected.
82 connector_status_unknown = 3,
86 * enum drm_connector_registration_status - userspace registration status for
89 * This enum is used to track the status of initializing a connector and
90 * registering it with userspace, so that DRM can prevent bogus modesets on
91 * connectors that no longer exist.
93 enum drm_connector_registration_state {
95 * @DRM_CONNECTOR_INITIALIZING: The connector has just been created,
96 * but has yet to be exposed to userspace. There should be no
97 * additional restrictions to how the state of this connector may be
100 DRM_CONNECTOR_INITIALIZING = 0,
103 * @DRM_CONNECTOR_REGISTERED: The connector has been fully initialized
104 * and registered with sysfs, as such it has been exposed to
105 * userspace. There should be no additional restrictions to how the
106 * state of this connector may be modified.
108 DRM_CONNECTOR_REGISTERED = 1,
111 * @DRM_CONNECTOR_UNREGISTERED: The connector has either been exposed
112 * to userspace and has since been unregistered and removed from
113 * userspace, or the connector was unregistered before it had a chance
114 * to be exposed to userspace (e.g. still in the
115 * @DRM_CONNECTOR_INITIALIZING state). When a connector is
116 * unregistered, there are additional restrictions to how its state
119 * - An unregistered connector may only have its DPMS changed from
120 * On->Off. Once DPMS is changed to Off, it may not be switched back
122 * - Modesets are not allowed on unregistered connectors, unless they
123 * would result in disabling its assigned CRTCs. This means
124 * disabling a CRTC on an unregistered connector is OK, but enabling
126 * - Removing a CRTC from an unregistered connector is OK, but new
127 * CRTCs may never be assigned to an unregistered connector.
129 DRM_CONNECTOR_UNREGISTERED = 2,
132 enum subpixel_order {
134 SubPixelHorizontalRGB,
135 SubPixelHorizontalBGR,
143 * struct drm_scrambling: sink's scrambling support.
145 struct drm_scrambling {
147 * @supported: scrambling supported for rates > 340 Mhz.
151 * @low_rates: scrambling supported for rates <= 340 Mhz.
157 * struct drm_scdc - Information about scdc capabilities of a HDMI 2.0 sink
159 * Provides SCDC register support and capabilities related information on a
160 * HDMI 2.0 sink. In case of a HDMI 1.4 sink, all parameter must be 0.
164 * @supported: status control & data channel present.
168 * @read_request: sink is capable of generating scdc read request.
172 * @scrambling: sink's scrambling capabilities
174 struct drm_scrambling scrambling;
179 * struct drm_hdmi_info - runtime information about the connected HDMI sink
181 * Describes if a given display supports advanced HDMI 2.0 features.
182 * This information is available in CEA-861-F extension blocks (like HF-VSDB).
184 struct drm_hdmi_info {
185 /** @scdc: sink's scdc support and capabilities */
186 struct drm_scdc scdc;
189 * @y420_vdb_modes: bitmap of modes which can support ycbcr420
190 * output only (not normal RGB/YCBCR444/422 outputs). There are total
191 * 107 VICs defined by CEA-861-F spec, so the size is 128 bits to map
194 unsigned long y420_vdb_modes[BITS_TO_LONGS(128)];
197 * @y420_cmdb_modes: bitmap of modes which can support ycbcr420
198 * output also, along with normal HDMI outputs. There are total 107
199 * VICs defined by CEA-861-F spec, so the size is 128 bits to map upto
202 unsigned long y420_cmdb_modes[BITS_TO_LONGS(128)];
204 /** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */
207 /** @y420_dc_modes: bitmap of deep color support index */
212 * enum drm_link_status - connector's link_status property value
214 * This enum is used as the connector's link status property value.
215 * It is set to the values defined in uapi.
217 * @DRM_LINK_STATUS_GOOD: DP Link is Good as a result of successful
219 * @DRM_LINK_STATUS_BAD: DP Link is BAD as a result of link training
222 enum drm_link_status {
223 DRM_LINK_STATUS_GOOD = DRM_MODE_LINK_STATUS_GOOD,
224 DRM_LINK_STATUS_BAD = DRM_MODE_LINK_STATUS_BAD,
228 * enum drm_panel_orientation - panel_orientation info for &drm_display_info
230 * This enum is used to track the (LCD) panel orientation. There are no
231 * separate #defines for the uapi!
233 * @DRM_MODE_PANEL_ORIENTATION_UNKNOWN: The drm driver has not provided any
234 * panel orientation information (normal
235 * for non panels) in this case the "panel
236 * orientation" connector prop will not be
238 * @DRM_MODE_PANEL_ORIENTATION_NORMAL: The top side of the panel matches the
239 * top side of the device's casing.
240 * @DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: The top side of the panel matches the
241 * bottom side of the device's casing, iow
242 * the panel is mounted upside-down.
243 * @DRM_MODE_PANEL_ORIENTATION_LEFT_UP: The left side of the panel matches the
244 * top side of the device's casing.
245 * @DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: The right side of the panel matches the
246 * top side of the device's casing.
248 enum drm_panel_orientation {
249 DRM_MODE_PANEL_ORIENTATION_UNKNOWN = -1,
250 DRM_MODE_PANEL_ORIENTATION_NORMAL = 0,
251 DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP,
252 DRM_MODE_PANEL_ORIENTATION_LEFT_UP,
253 DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
257 * This is a consolidated colorimetry list supported by HDMI and
258 * DP protocol standard. The respective connectors will register
259 * a property with the subset of this list (supported by that
260 * respective protocol). Userspace will set the colorspace through
261 * a colorspace property which will be created and exposed to
265 /* For Default case, driver will set the colorspace */
266 #define DRM_MODE_COLORIMETRY_DEFAULT 0
267 /* CEA 861 Normal Colorimetry options */
268 #define DRM_MODE_COLORIMETRY_NO_DATA 0
269 #define DRM_MODE_COLORIMETRY_SMPTE_170M_YCC 1
270 #define DRM_MODE_COLORIMETRY_BT709_YCC 2
271 /* CEA 861 Extended Colorimetry Options */
272 #define DRM_MODE_COLORIMETRY_XVYCC_601 3
273 #define DRM_MODE_COLORIMETRY_XVYCC_709 4
274 #define DRM_MODE_COLORIMETRY_SYCC_601 5
275 #define DRM_MODE_COLORIMETRY_OPYCC_601 6
276 #define DRM_MODE_COLORIMETRY_OPRGB 7
277 #define DRM_MODE_COLORIMETRY_BT2020_CYCC 8
278 #define DRM_MODE_COLORIMETRY_BT2020_RGB 9
279 #define DRM_MODE_COLORIMETRY_BT2020_YCC 10
280 /* Additional Colorimetry extension added as part of CTA 861.G */
281 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65 11
282 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER 12
285 * enum drm_bus_flags - bus_flags info for &drm_display_info
287 * This enum defines signal polarities and clock edge information for signals on
288 * a bus as bitmask flags.
290 * The clock edge information is conveyed by two sets of symbols,
291 * DRM_BUS_FLAGS_*_DRIVE_\* and DRM_BUS_FLAGS_*_SAMPLE_\*. When this enum is
292 * used to describe a bus from the point of view of the transmitter, the
293 * \*_DRIVE_\* flags should be used. When used from the point of view of the
294 * receiver, the \*_SAMPLE_\* flags should be used. The \*_DRIVE_\* and
295 * \*_SAMPLE_\* flags alias each other, with the \*_SAMPLE_POSEDGE and
296 * \*_SAMPLE_NEGEDGE flags being equal to \*_DRIVE_NEGEDGE and \*_DRIVE_POSEDGE
297 * respectively. This simplifies code as signals are usually sampled on the
298 * opposite edge of the driving edge. Transmitters and receivers may however
299 * need to take other signal timings into account to convert between driving
302 * @DRM_BUS_FLAG_DE_LOW: The Data Enable signal is active low
303 * @DRM_BUS_FLAG_DE_HIGH: The Data Enable signal is active high
304 * @DRM_BUS_FLAG_PIXDATA_POSEDGE: Legacy value, do not use
305 * @DRM_BUS_FLAG_PIXDATA_NEGEDGE: Legacy value, do not use
306 * @DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE: Data is driven on the rising edge of
308 * @DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE: Data is driven on the falling edge of
310 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE: Data is sampled on the rising edge of
312 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE: Data is sampled on the falling edge of
314 * @DRM_BUS_FLAG_DATA_MSB_TO_LSB: Data is transmitted MSB to LSB on the bus
315 * @DRM_BUS_FLAG_DATA_LSB_TO_MSB: Data is transmitted LSB to MSB on the bus
316 * @DRM_BUS_FLAG_SYNC_POSEDGE: Legacy value, do not use
317 * @DRM_BUS_FLAG_SYNC_NEGEDGE: Legacy value, do not use
318 * @DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE: Sync signals are driven on the rising
319 * edge of the pixel clock
320 * @DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE: Sync signals are driven on the falling
321 * edge of the pixel clock
322 * @DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE: Sync signals are sampled on the rising
323 * edge of the pixel clock
324 * @DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE: Sync signals are sampled on the falling
325 * edge of the pixel clock
328 DRM_BUS_FLAG_DE_LOW = BIT(0),
329 DRM_BUS_FLAG_DE_HIGH = BIT(1),
330 DRM_BUS_FLAG_PIXDATA_POSEDGE = BIT(2),
331 DRM_BUS_FLAG_PIXDATA_NEGEDGE = BIT(3),
332 DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE = DRM_BUS_FLAG_PIXDATA_POSEDGE,
333 DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_NEGEDGE,
334 DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE = DRM_BUS_FLAG_PIXDATA_NEGEDGE,
335 DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_POSEDGE,
336 DRM_BUS_FLAG_DATA_MSB_TO_LSB = BIT(4),
337 DRM_BUS_FLAG_DATA_LSB_TO_MSB = BIT(5),
338 DRM_BUS_FLAG_SYNC_POSEDGE = BIT(6),
339 DRM_BUS_FLAG_SYNC_NEGEDGE = BIT(7),
340 DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE = DRM_BUS_FLAG_SYNC_POSEDGE,
341 DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE = DRM_BUS_FLAG_SYNC_NEGEDGE,
342 DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE = DRM_BUS_FLAG_SYNC_NEGEDGE,
343 DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE = DRM_BUS_FLAG_SYNC_POSEDGE,
347 * struct drm_display_info - runtime data about the connected sink
349 * Describes a given display (e.g. CRT or flat panel) and its limitations. For
350 * fixed display sinks like built-in panels there's not much difference between
351 * this and &struct drm_connector. But for sinks with a real cable this
352 * structure is meant to describe all the things at the other end of the cable.
354 * For sinks which provide an EDID this can be filled out by calling
355 * drm_add_edid_modes().
357 struct drm_display_info {
359 * @width_mm: Physical width in mm.
361 unsigned int width_mm;
364 * @height_mm: Physical height in mm.
366 unsigned int height_mm;
369 * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
374 * @subpixel_order: Subpixel order of LCD panels.
376 enum subpixel_order subpixel_order;
378 #define DRM_COLOR_FORMAT_RGB444 (1<<0)
379 #define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
380 #define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
381 #define DRM_COLOR_FORMAT_YCRCB420 (1<<3)
384 * @panel_orientation: Read only connector property for built-in panels,
385 * indicating the orientation of the panel vs the device's casing.
386 * drm_connector_init() sets this to DRM_MODE_PANEL_ORIENTATION_UNKNOWN.
387 * When not UNKNOWN this gets used by the drm_fb_helpers to rotate the
388 * fb to compensate and gets exported as prop to userspace.
390 int panel_orientation;
393 * @color_formats: HDMI Color formats, selects between RGB and YCrCb
394 * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
395 * as used to describe the pixel format in framebuffers, and also don't
396 * match the formats in @bus_formats which are shared with v4l.
401 * @bus_formats: Pixel data format on the wire, somewhat redundant with
402 * @color_formats. Array of size @num_bus_formats encoded using
403 * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
405 const u32 *bus_formats;
407 * @num_bus_formats: Size of @bus_formats array.
409 unsigned int num_bus_formats;
412 * @bus_flags: Additional information (like pixel signal polarity) for
413 * the pixel data on the bus, using &enum drm_bus_flags values
419 * @max_tmds_clock: Maximum TMDS clock rate supported by the
420 * sink in kHz. 0 means undefined.
425 * @dvi_dual: Dual-link DVI sink?
430 * @has_hdmi_infoframe: Does the sink support the HDMI infoframe?
432 bool has_hdmi_infoframe;
435 * @rgb_quant_range_selectable: Does the sink support selecting
436 * the RGB quantization range?
438 bool rgb_quant_range_selectable;
441 * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even
442 * more stuff redundant with @bus_formats.
444 u8 edid_hdmi_dc_modes;
447 * @cea_rev: CEA revision of the HDMI sink.
452 * @hdmi: advance features of a HDMI sink.
454 struct drm_hdmi_info hdmi;
457 * @non_desktop: Non desktop display (HMD).
462 int drm_display_info_set_bus_formats(struct drm_display_info *info,
464 unsigned int num_formats);
467 * struct drm_connector_tv_margins - TV connector related margins
469 * Describes the margins in pixels to put around the image on TV
470 * connectors to deal with overscan.
472 struct drm_connector_tv_margins {
474 * @bottom: Bottom margin in pixels.
479 * @left: Left margin in pixels.
484 * @right: Right margin in pixels.
489 * @top: Top margin in pixels.
495 * struct drm_tv_connector_state - TV connector related states
496 * @subconnector: selected subconnector
497 * @margins: TV margins
499 * @brightness: brightness in percent
500 * @contrast: contrast in percent
501 * @flicker_reduction: flicker reduction in percent
502 * @overscan: overscan in percent
503 * @saturation: saturation in percent
504 * @hue: hue in percent
506 struct drm_tv_connector_state {
507 enum drm_mode_subconnector subconnector;
508 struct drm_connector_tv_margins margins;
510 unsigned int brightness;
511 unsigned int contrast;
512 unsigned int flicker_reduction;
513 unsigned int overscan;
514 unsigned int saturation;
519 * struct drm_connector_state - mutable connector state
521 struct drm_connector_state {
522 /** @connector: backpointer to the connector */
523 struct drm_connector *connector;
526 * @crtc: CRTC to connect connector to, NULL if disabled.
528 * Do not change this directly, use drm_atomic_set_crtc_for_connector()
531 struct drm_crtc *crtc;
536 * Used by the atomic helpers to select the encoder, through the
537 * &drm_connector_helper_funcs.atomic_best_encoder or
538 * &drm_connector_helper_funcs.best_encoder callbacks.
540 * This is also used in the atomic helpers to map encoders to their
541 * current and previous connectors, see
542 * &drm_atomic_get_old_connector_for_encoder() and
543 * &drm_atomic_get_new_connector_for_encoder().
545 * NOTE: Atomic drivers must fill this out (either themselves or through
546 * helpers), for otherwise the GETCONNECTOR and GETENCODER IOCTLs will
547 * not return correct data to userspace.
549 struct drm_encoder *best_encoder;
552 * @link_status: Connector link_status to keep track of whether link is
553 * GOOD or BAD to notify userspace if retraining is necessary.
555 enum drm_link_status link_status;
557 /** @state: backpointer to global drm_atomic_state */
558 struct drm_atomic_state *state;
561 * @commit: Tracks the pending commit to prevent use-after-free conditions.
563 * Is only set when @crtc is NULL.
565 struct drm_crtc_commit *commit;
567 /** @tv: TV connector state */
568 struct drm_tv_connector_state tv;
571 * @self_refresh_aware:
573 * This tracks whether a connector is aware of the self refresh state.
574 * It should be set to true for those connector implementations which
575 * understand the self refresh state. This is needed since the crtc
576 * registers the self refresh helpers and it doesn't know if the
577 * connectors downstream have implemented self refresh entry/exit.
579 * Drivers should set this to true in atomic_check if they know how to
580 * handle self_refresh requests.
582 bool self_refresh_aware;
585 * @picture_aspect_ratio: Connector property to control the
586 * HDMI infoframe aspect ratio setting.
588 * The %DRM_MODE_PICTURE_ASPECT_\* values much match the
589 * values for &enum hdmi_picture_aspect
591 enum hdmi_picture_aspect picture_aspect_ratio;
594 * @content_type: Connector property to control the
595 * HDMI infoframe content type setting.
596 * The %DRM_MODE_CONTENT_TYPE_\* values much
599 unsigned int content_type;
602 * @scaling_mode: Connector property to control the
603 * upscaling, mostly used for built-in panels.
605 unsigned int scaling_mode;
608 * @content_protection: Connector property to request content
609 * protection. This is most commonly used for HDCP.
611 unsigned int content_protection;
614 * @colorspace: State variable for Connector property to request
615 * colorspace change on Sink. This is most commonly used to switch
616 * to wider color gamuts like BT2020.
621 * @writeback_job: Writeback job for writeback connectors
623 * Holds the framebuffer and out-fence for a writeback connector. As
624 * the writeback completion may be asynchronous to the normal commit
625 * cycle, the writeback job lifetime is managed separately from the
626 * normal atomic state by this object.
628 * See also: drm_writeback_queue_job() and
629 * drm_writeback_signal_completion()
631 struct drm_writeback_job *writeback_job;
634 * @max_requested_bpc: Connector property to limit the maximum bit
635 * depth of the pixels.
637 u8 max_requested_bpc;
640 * @max_bpc: Connector max_bpc based on the requested max_bpc property
641 * and the connector bpc limitations obtained from edid.
646 * @hdr_output_metadata:
647 * DRM blob property for HDR output metadata
649 struct drm_property_blob *hdr_output_metadata;
653 * struct drm_connector_funcs - control connectors on a given device
655 * Each CRTC may have one or more connectors attached to it. The functions
656 * below allow the core DRM code to control connectors, enumerate available modes,
659 struct drm_connector_funcs {
663 * Legacy entry point to set the per-connector DPMS state. Legacy DPMS
664 * is exposed as a standard property on the connector, but diverted to
665 * this callback in the drm core. Note that atomic drivers don't
666 * implement the 4 level DPMS support on the connector any more, but
667 * instead only have an on/off "ACTIVE" property on the CRTC object.
669 * This hook is not used by atomic drivers, remapping of the legacy DPMS
670 * property is entirely handled in the DRM core.
674 * 0 on success or a negative error code on failure.
676 int (*dpms)(struct drm_connector *connector, int mode);
681 * Reset connector hardware and software state to off. This function isn't
682 * called by the core directly, only through drm_mode_config_reset().
683 * It's not a helper hook only for historical reasons.
685 * Atomic drivers can use drm_atomic_helper_connector_reset() to reset
686 * atomic state using this hook.
688 void (*reset)(struct drm_connector *connector);
693 * Check to see if anything is attached to the connector. The parameter
694 * force is set to false whilst polling, true when checking the
695 * connector due to a user request. force can be used by the driver to
696 * avoid expensive, destructive operations during automated probing.
698 * This callback is optional, if not implemented the connector will be
699 * considered as always being attached.
703 * Note that this hook is only called by the probe helper. It's not in
704 * the helper library vtable purely for historical reasons. The only DRM
705 * core entry point to probe connector state is @fill_modes.
707 * Note that the helper library will already hold
708 * &drm_mode_config.connection_mutex. Drivers which need to grab additional
709 * locks to avoid races with concurrent modeset changes need to use
710 * &drm_connector_helper_funcs.detect_ctx instead.
714 * drm_connector_status indicating the connector's status.
716 enum drm_connector_status (*detect)(struct drm_connector *connector,
722 * This function is called to update internal encoder state when the
723 * connector is forced to a certain state by userspace, either through
724 * the sysfs interfaces or on the kernel cmdline. In that case the
725 * @detect callback isn't called.
729 * Note that this hook is only called by the probe helper. It's not in
730 * the helper library vtable purely for historical reasons. The only DRM
731 * core entry point to probe connector state is @fill_modes.
733 void (*force)(struct drm_connector *connector);
738 * Entry point for output detection and basic mode validation. The
739 * driver should reprobe the output if needed (e.g. when hotplug
740 * handling is unreliable), add all detected modes to &drm_connector.modes
741 * and filter out any the device can't support in any configuration. It
742 * also needs to filter out any modes wider or higher than the
743 * parameters max_width and max_height indicate.
745 * The drivers must also prune any modes no longer valid from
746 * &drm_connector.modes. Furthermore it must update
747 * &drm_connector.status and &drm_connector.edid. If no EDID has been
748 * received for this output connector->edid must be NULL.
750 * Drivers using the probe helpers should use
751 * drm_helper_probe_single_connector_modes() to implement this
756 * The number of modes detected and filled into &drm_connector.modes.
758 int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
763 * This is the legacy entry point to update a property attached to the
766 * This callback is optional if the driver does not support any legacy
767 * driver-private properties. For atomic drivers it is not used because
768 * property handling is done entirely in the DRM core.
772 * 0 on success or a negative error code on failure.
774 int (*set_property)(struct drm_connector *connector, struct drm_property *property,
780 * This optional hook can be used to register additional userspace
781 * interfaces attached to the connector, light backlight control, i2c,
782 * DP aux or similar interfaces. It is called late in the driver load
783 * sequence from drm_connector_register() when registering all the
784 * core drm connector interfaces. Everything added from this callback
785 * should be unregistered in the early_unregister callback.
787 * This is called while holding &drm_connector.mutex.
791 * 0 on success, or a negative error code on failure.
793 int (*late_register)(struct drm_connector *connector);
798 * This optional hook should be used to unregister the additional
799 * userspace interfaces attached to the connector from
800 * late_register(). It is called from drm_connector_unregister(),
801 * early in the driver unload sequence to disable userspace access
802 * before data structures are torndown.
804 * This is called while holding &drm_connector.mutex.
806 void (*early_unregister)(struct drm_connector *connector);
811 * Clean up connector resources. This is called at driver unload time
812 * through drm_mode_config_cleanup(). It can also be called at runtime
813 * when a connector is being hot-unplugged for drivers that support
814 * connector hotplugging (e.g. DisplayPort MST).
816 void (*destroy)(struct drm_connector *connector);
819 * @atomic_duplicate_state:
821 * Duplicate the current atomic state for this connector and return it.
822 * The core and helpers guarantee that any atomic state duplicated with
823 * this hook and still owned by the caller (i.e. not transferred to the
824 * driver by calling &drm_mode_config_funcs.atomic_commit) will be
825 * cleaned up by calling the @atomic_destroy_state hook in this
828 * This callback is mandatory for atomic drivers.
830 * Atomic drivers which don't subclass &struct drm_connector_state should use
831 * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
832 * state structure to extend it with driver-private state should use
833 * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is
834 * duplicated in a consistent fashion across drivers.
836 * It is an error to call this hook before &drm_connector.state has been
837 * initialized correctly.
841 * If the duplicate state references refcounted resources this hook must
842 * acquire a reference for each of them. The driver must release these
843 * references again in @atomic_destroy_state.
847 * Duplicated atomic state or NULL when the allocation failed.
849 struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector);
852 * @atomic_destroy_state:
854 * Destroy a state duplicated with @atomic_duplicate_state and release
855 * or unreference all resources it references
857 * This callback is mandatory for atomic drivers.
859 void (*atomic_destroy_state)(struct drm_connector *connector,
860 struct drm_connector_state *state);
863 * @atomic_set_property:
865 * Decode a driver-private property value and store the decoded value
866 * into the passed-in state structure. Since the atomic core decodes all
867 * standardized properties (even for extensions beyond the core set of
868 * properties which might not be implemented by all drivers) this
869 * requires drivers to subclass the state structure.
871 * Such driver-private properties should really only be implemented for
872 * truly hardware/vendor specific state. Instead it is preferred to
873 * standardize atomic extension and decode the properties used to expose
874 * such an extension in the core.
876 * Do not call this function directly, use
877 * drm_atomic_connector_set_property() instead.
879 * This callback is optional if the driver does not support any
880 * driver-private atomic properties.
884 * This function is called in the state assembly phase of atomic
885 * modesets, which can be aborted for any reason (including on
886 * userspace's request to just check whether a configuration would be
887 * possible). Drivers MUST NOT touch any persistent state (hardware or
888 * software) or data structures except the passed in @state parameter.
890 * Also since userspace controls in which order properties are set this
891 * function must not do any input validation (since the state update is
892 * incomplete and hence likely inconsistent). Instead any such input
893 * validation must be done in the various atomic_check callbacks.
897 * 0 if the property has been found, -EINVAL if the property isn't
898 * implemented by the driver (which shouldn't ever happen, the core only
899 * asks for properties attached to this connector). No other validation
900 * is allowed by the driver. The core already checks that the property
901 * value is within the range (integer, valid enum value, ...) the driver
902 * set when registering the property.
904 int (*atomic_set_property)(struct drm_connector *connector,
905 struct drm_connector_state *state,
906 struct drm_property *property,
910 * @atomic_get_property:
912 * Reads out the decoded driver-private property. This is used to
913 * implement the GETCONNECTOR IOCTL.
915 * Do not call this function directly, use
916 * drm_atomic_connector_get_property() instead.
918 * This callback is optional if the driver does not support any
919 * driver-private atomic properties.
923 * 0 on success, -EINVAL if the property isn't implemented by the
924 * driver (which shouldn't ever happen, the core only asks for
925 * properties attached to this connector).
927 int (*atomic_get_property)(struct drm_connector *connector,
928 const struct drm_connector_state *state,
929 struct drm_property *property,
933 * @atomic_print_state:
935 * If driver subclasses &struct drm_connector_state, it should implement
936 * this optional hook for printing additional driver specific state.
938 * Do not call this directly, use drm_atomic_connector_print_state()
941 void (*atomic_print_state)(struct drm_printer *p,
942 const struct drm_connector_state *state);
946 * struct drm_cmdline_mode - DRM Mode passed through the kernel command-line
948 * Each connector can have an initial mode with additional options
949 * passed through the kernel command line. This structure allows to
950 * express those parameters and will be filled by the command-line
953 struct drm_cmdline_mode {
959 char name[DRM_DISPLAY_MODE_LEN];
964 * Has a mode been read from the command-line?
969 * @refresh_specified:
971 * Did the mode have a preferred refresh rate?
973 bool refresh_specified;
978 * Did the mode have a preferred BPP?
985 * Active resolution on the X axis, in pixels.
992 * Active resolution on the Y axis, in pixels.
999 * Bits per pixels for the mode.
1006 * Refresh rate, in Hertz.
1013 * Do we need to use reduced blanking?
1020 * The mode is interlaced.
1027 * The timings will be calculated using the VESA Coordinated
1028 * Video Timings instead of looking up the mode from a table.
1035 * Add margins to the mode calculation (1.8% of xres rounded
1036 * down to 8 pixels and 1.8% of yres).
1043 * Ignore the hotplug state of the connector, and force its
1044 * state to one of the DRM_FORCE_* values.
1046 enum drm_connector_force force;
1049 * @rotation_reflection:
1051 * Initial rotation and reflection of the mode setup from the
1052 * command line. See DRM_MODE_ROTATE_* and
1053 * DRM_MODE_REFLECT_*. The only rotations supported are
1054 * DRM_MODE_ROTATE_0 and DRM_MODE_ROTATE_180.
1056 unsigned int rotation_reflection;
1059 * @tv_margins: TV margins to apply to the mode.
1061 struct drm_connector_tv_margins tv_margins;
1065 * struct drm_connector - central DRM connector control structure
1067 * Each connector may be connected to one or more CRTCs, or may be clonable by
1068 * another connector if they can share a CRTC. Each connector also has a specific
1069 * position in the broader display (referred to as a 'screen' though it could
1070 * span multiple monitors).
1072 struct drm_connector {
1073 /** @dev: parent DRM device */
1074 struct drm_device *dev;
1075 /** @kdev: kernel device for sysfs attributes */
1076 struct device *kdev;
1077 /** @attr: sysfs attributes */
1078 struct device_attribute *attr;
1083 * List of all connectors on a @dev, linked from
1084 * &drm_mode_config.connector_list. Protected by
1085 * &drm_mode_config.connector_list_lock, but please only use
1086 * &drm_connector_list_iter to walk this list.
1088 struct list_head head;
1090 /** @base: base KMS object */
1091 struct drm_mode_object base;
1093 /** @name: human readable name, can be overwritten by the driver */
1097 * @mutex: Lock for general connector state, but currently only protects
1098 * @registered. Most of the connector state is still protected by
1099 * &drm_mode_config.mutex.
1104 * @index: Compacted connector index, which matches the position inside
1105 * the mode_config.list for drivers not supporting hot-add/removing. Can
1106 * be used as an array index. It is invariant over the lifetime of the
1113 * one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
1116 /** @connector_type_id: index into connector type enum */
1117 int connector_type_id;
1119 * @interlace_allowed:
1120 * Can this connector handle interlaced modes? Only used by
1121 * drm_helper_probe_single_connector_modes() for mode filtering.
1123 bool interlace_allowed;
1125 * @doublescan_allowed:
1126 * Can this connector handle doublescan? Only used by
1127 * drm_helper_probe_single_connector_modes() for mode filtering.
1129 bool doublescan_allowed;
1132 * Can this connector handle stereo modes? Only used by
1133 * drm_helper_probe_single_connector_modes() for mode filtering.
1135 bool stereo_allowed;
1138 * @ycbcr_420_allowed : This bool indicates if this connector is
1139 * capable of handling YCBCR 420 output. While parsing the EDID
1140 * blocks it's very helpful to know if the source is capable of
1141 * handling YCBCR 420 outputs.
1143 bool ycbcr_420_allowed;
1146 * @registration_state: Is this connector initializing, exposed
1147 * (registered) with userspace, or unregistered?
1149 * Protected by @mutex.
1151 enum drm_connector_registration_state registration_state;
1155 * Modes available on this connector (from fill_modes() + user).
1156 * Protected by &drm_mode_config.mutex.
1158 struct list_head modes;
1162 * One of the drm_connector_status enums (connected, not, or unknown).
1163 * Protected by &drm_mode_config.mutex.
1165 enum drm_connector_status status;
1169 * These are modes added by probing with DDC or the BIOS, before
1170 * filtering is applied. Used by the probe helpers. Protected by
1171 * &drm_mode_config.mutex.
1173 struct list_head probed_modes;
1176 * @display_info: Display information is filled from EDID information
1177 * when a display is detected. For non hot-pluggable displays such as
1178 * flat panels in embedded systems, the driver should initialize the
1179 * &drm_display_info.width_mm and &drm_display_info.height_mm fields
1180 * with the physical size of the display.
1182 * Protected by &drm_mode_config.mutex.
1184 struct drm_display_info display_info;
1186 /** @funcs: connector control functions */
1187 const struct drm_connector_funcs *funcs;
1190 * @edid_blob_ptr: DRM property containing EDID if present. Protected by
1191 * &drm_mode_config.mutex. This should be updated only by calling
1192 * drm_connector_update_edid_property().
1194 struct drm_property_blob *edid_blob_ptr;
1196 /** @properties: property tracking for this connector */
1197 struct drm_object_properties properties;
1200 * @scaling_mode_property: Optional atomic property to control the
1201 * upscaling. See drm_connector_attach_content_protection_property().
1203 struct drm_property *scaling_mode_property;
1206 * @vrr_capable_property: Optional property to help userspace
1207 * query hardware support for variable refresh rate on a connector.
1208 * connector. Drivers can add the property to a connector by
1209 * calling drm_connector_attach_vrr_capable_property().
1211 * This should be updated only by calling
1212 * drm_connector_set_vrr_capable_property().
1214 struct drm_property *vrr_capable_property;
1217 * @colorspace_property: Connector property to set the suitable
1218 * colorspace supported by the sink.
1220 struct drm_property *colorspace_property;
1225 * DRM blob property data for the DP MST path property. This should only
1226 * be updated by calling drm_connector_set_path_property().
1228 struct drm_property_blob *path_blob_ptr;
1231 * @max_bpc_property: Default connector property for the max bpc to be
1232 * driven out of the connector.
1234 struct drm_property *max_bpc_property;
1236 #define DRM_CONNECTOR_POLL_HPD (1 << 0)
1237 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
1238 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
1243 * Connector polling mode, a combination of
1245 * DRM_CONNECTOR_POLL_HPD
1246 * The connector generates hotplug events and doesn't need to be
1247 * periodically polled. The CONNECT and DISCONNECT flags must not
1248 * be set together with the HPD flag.
1250 * DRM_CONNECTOR_POLL_CONNECT
1251 * Periodically poll the connector for connection.
1253 * DRM_CONNECTOR_POLL_DISCONNECT
1254 * Periodically poll the connector for disconnection, without
1255 * causing flickering even when the connector is in use. DACs should
1256 * rarely do this without a lot of testing.
1258 * Set to 0 for connectors that don't support connection status
1264 * @dpms: Current dpms state. For legacy drivers the
1265 * &drm_connector_funcs.dpms callback must update this. For atomic
1266 * drivers, this is handled by the core atomic code, and drivers must
1267 * only take &drm_crtc_state.active into account.
1271 /** @helper_private: mid-layer private data */
1272 const struct drm_connector_helper_funcs *helper_private;
1274 /** @cmdline_mode: mode line parsed from the kernel cmdline for this connector */
1275 struct drm_cmdline_mode cmdline_mode;
1276 /** @force: a DRM_FORCE_<foo> state for forced mode sets */
1277 enum drm_connector_force force;
1278 /** @override_edid: has the EDID been overwritten through debugfs for testing? */
1281 #define DRM_CONNECTOR_MAX_ENCODER 3
1283 * @encoder_ids: Valid encoders for this connector. Please only use
1284 * drm_connector_for_each_possible_encoder() to enumerate these.
1286 uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER];
1289 * @encoder: Currently bound encoder driving this connector, if any.
1290 * Only really meaningful for non-atomic drivers. Atomic drivers should
1291 * instead look at &drm_connector_state.best_encoder, and in case they
1292 * need the CRTC driving this output, &drm_connector_state.crtc.
1294 struct drm_encoder *encoder;
1296 #define MAX_ELD_BYTES 128
1297 /** @eld: EDID-like data, if present */
1298 uint8_t eld[MAX_ELD_BYTES];
1299 /** @latency_present: AV delay info from ELD, if found */
1300 bool latency_present[2];
1302 * @video_latency: Video latency info from ELD, if found.
1303 * [0]: progressive, [1]: interlaced
1305 int video_latency[2];
1307 * @audio_latency: audio latency info from ELD, if found
1308 * [0]: progressive, [1]: interlaced
1310 int audio_latency[2];
1312 * @null_edid_counter: track sinks that give us all zeros for the EDID.
1313 * Needed to workaround some HW bugs where we get all 0s
1315 int null_edid_counter;
1317 /** @bad_edid_counter: track sinks that give us an EDID with invalid checksum */
1318 unsigned bad_edid_counter;
1321 * @edid_corrupt: Indicates whether the last read EDID was corrupt. Used
1322 * in Displayport compliance testing - Displayport Link CTS Core 1.2
1327 /** @debugfs_entry: debugfs directory for this connector */
1328 struct dentry *debugfs_entry;
1333 * Current atomic state for this connector.
1335 * This is protected by &drm_mode_config.connection_mutex. Note that
1336 * nonblocking atomic commits access the current connector state without
1337 * taking locks. Either by going through the &struct drm_atomic_state
1338 * pointers, see for_each_oldnew_connector_in_state(),
1339 * for_each_old_connector_in_state() and
1340 * for_each_new_connector_in_state(). Or through careful ordering of
1341 * atomic commit operations as implemented in the atomic helpers, see
1342 * &struct drm_crtc_commit.
1344 struct drm_connector_state *state;
1346 /* DisplayID bits. FIXME: Extract into a substruct? */
1351 * DRM blob property data for the tile property (used mostly by DP MST).
1352 * This is meant for screens which are driven through separate display
1353 * pipelines represented by &drm_crtc, which might not be running with
1354 * genlocked clocks. For tiled panels which are genlocked, like
1355 * dual-link LVDS or dual-link DSI, the driver should try to not expose
1356 * the tiling and virtualize both &drm_crtc and &drm_plane if needed.
1358 * This should only be updated by calling
1359 * drm_connector_set_tile_property().
1361 struct drm_property_blob *tile_blob_ptr;
1363 /** @has_tile: is this connector connected to a tiled monitor */
1365 /** @tile_group: tile group for the connected monitor */
1366 struct drm_tile_group *tile_group;
1367 /** @tile_is_single_monitor: whether the tile is one monitor housing */
1368 bool tile_is_single_monitor;
1370 /** @num_h_tile: number of horizontal tiles in the tile group */
1371 /** @num_v_tile: number of vertical tiles in the tile group */
1372 uint8_t num_h_tile, num_v_tile;
1373 /** @tile_h_loc: horizontal location of this tile */
1374 /** @tile_v_loc: vertical location of this tile */
1375 uint8_t tile_h_loc, tile_v_loc;
1376 /** @tile_h_size: horizontal size of this tile. */
1377 /** @tile_v_size: vertical size of this tile. */
1378 uint16_t tile_h_size, tile_v_size;
1383 * List used only by &drm_connector_list_iter to be able to clean up a
1384 * connector from any context, in conjunction with
1385 * &drm_mode_config.connector_free_work.
1387 struct llist_node free_node;
1389 /** @hdr_sink_metadata: HDR Metadata Information read from sink */
1390 struct hdr_sink_metadata hdr_sink_metadata;
1393 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
1395 int drm_connector_init(struct drm_device *dev,
1396 struct drm_connector *connector,
1397 const struct drm_connector_funcs *funcs,
1398 int connector_type);
1399 void drm_connector_attach_edid_property(struct drm_connector *connector);
1400 int drm_connector_register(struct drm_connector *connector);
1401 void drm_connector_unregister(struct drm_connector *connector);
1402 int drm_connector_attach_encoder(struct drm_connector *connector,
1403 struct drm_encoder *encoder);
1405 void drm_connector_cleanup(struct drm_connector *connector);
1407 static inline unsigned int drm_connector_index(const struct drm_connector *connector)
1409 return connector->index;
1412 static inline u32 drm_connector_mask(const struct drm_connector *connector)
1414 return 1 << connector->index;
1418 * drm_connector_lookup - lookup connector object
1420 * @file_priv: drm file to check for lease against.
1421 * @id: connector object id
1423 * This function looks up the connector object specified by id
1424 * add takes a reference to it.
1426 static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
1427 struct drm_file *file_priv,
1430 struct drm_mode_object *mo;
1431 mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CONNECTOR);
1432 return mo ? obj_to_connector(mo) : NULL;
1436 * drm_connector_get - acquire a connector reference
1437 * @connector: DRM connector
1439 * This function increments the connector's refcount.
1441 static inline void drm_connector_get(struct drm_connector *connector)
1443 drm_mode_object_get(&connector->base);
1447 * drm_connector_put - release a connector reference
1448 * @connector: DRM connector
1450 * This function decrements the connector's reference count and frees the
1451 * object if the reference count drops to zero.
1453 static inline void drm_connector_put(struct drm_connector *connector)
1455 drm_mode_object_put(&connector->base);
1459 * drm_connector_is_unregistered - has the connector been unregistered from
1461 * @connector: DRM connector
1463 * Checks whether or not @connector has been unregistered from userspace.
1466 * True if the connector was unregistered, false if the connector is
1467 * registered or has not yet been registered with userspace.
1470 drm_connector_is_unregistered(struct drm_connector *connector)
1472 return READ_ONCE(connector->registration_state) ==
1473 DRM_CONNECTOR_UNREGISTERED;
1476 const char *drm_get_connector_status_name(enum drm_connector_status status);
1477 const char *drm_get_subpixel_order_name(enum subpixel_order order);
1478 const char *drm_get_dpms_name(int val);
1479 const char *drm_get_dvi_i_subconnector_name(int val);
1480 const char *drm_get_dvi_i_select_name(int val);
1481 const char *drm_get_tv_subconnector_name(int val);
1482 const char *drm_get_tv_select_name(int val);
1483 const char *drm_get_content_protection_name(int val);
1485 int drm_mode_create_dvi_i_properties(struct drm_device *dev);
1486 int drm_mode_create_tv_margin_properties(struct drm_device *dev);
1487 int drm_mode_create_tv_properties(struct drm_device *dev,
1488 unsigned int num_modes,
1489 const char * const modes[]);
1490 void drm_connector_attach_tv_margin_properties(struct drm_connector *conn);
1491 int drm_mode_create_scaling_mode_property(struct drm_device *dev);
1492 int drm_connector_attach_content_type_property(struct drm_connector *dev);
1493 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1494 u32 scaling_mode_mask);
1495 int drm_connector_attach_vrr_capable_property(
1496 struct drm_connector *connector);
1497 int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
1498 int drm_mode_create_colorspace_property(struct drm_connector *connector);
1499 int drm_mode_create_content_type_property(struct drm_device *dev);
1500 void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
1501 const struct drm_connector_state *conn_state);
1503 int drm_mode_create_suggested_offset_properties(struct drm_device *dev);
1505 int drm_connector_set_path_property(struct drm_connector *connector,
1507 int drm_connector_set_tile_property(struct drm_connector *connector);
1508 int drm_connector_update_edid_property(struct drm_connector *connector,
1509 const struct edid *edid);
1510 void drm_connector_set_link_status_property(struct drm_connector *connector,
1511 uint64_t link_status);
1512 void drm_connector_set_vrr_capable_property(
1513 struct drm_connector *connector, bool capable);
1514 int drm_connector_init_panel_orientation_property(
1515 struct drm_connector *connector, int width, int height);
1516 int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
1520 * struct drm_tile_group - Tile group metadata
1521 * @refcount: reference count
1523 * @id: tile group id exposed to userspace
1524 * @group_data: Sink-private data identifying this group
1526 * @group_data corresponds to displayid vend/prod/serial for external screens
1529 struct drm_tile_group {
1530 struct kref refcount;
1531 struct drm_device *dev;
1536 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1538 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1540 void drm_mode_put_tile_group(struct drm_device *dev,
1541 struct drm_tile_group *tg);
1544 * struct drm_connector_list_iter - connector_list iterator
1546 * This iterator tracks state needed to be able to walk the connector_list
1547 * within struct drm_mode_config. Only use together with
1548 * drm_connector_list_iter_begin(), drm_connector_list_iter_end() and
1549 * drm_connector_list_iter_next() respectively the convenience macro
1550 * drm_for_each_connector_iter().
1552 struct drm_connector_list_iter {
1554 struct drm_device *dev;
1555 struct drm_connector *conn;
1558 void drm_connector_list_iter_begin(struct drm_device *dev,
1559 struct drm_connector_list_iter *iter);
1560 struct drm_connector *
1561 drm_connector_list_iter_next(struct drm_connector_list_iter *iter);
1562 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter);
1564 bool drm_connector_has_possible_encoder(struct drm_connector *connector,
1565 struct drm_encoder *encoder);
1568 * drm_for_each_connector_iter - connector_list iterator macro
1569 * @connector: &struct drm_connector pointer used as cursor
1570 * @iter: &struct drm_connector_list_iter
1572 * Note that @connector is only valid within the list body, if you want to use
1573 * @connector after calling drm_connector_list_iter_end() then you need to grab
1574 * your own reference first using drm_connector_get().
1576 #define drm_for_each_connector_iter(connector, iter) \
1577 while ((connector = drm_connector_list_iter_next(iter)))
1580 * drm_connector_for_each_possible_encoder - iterate connector's possible encoders
1581 * @connector: &struct drm_connector pointer
1582 * @encoder: &struct drm_encoder pointer used as cursor
1583 * @__i: int iteration cursor, for macro-internal use
1585 #define drm_connector_for_each_possible_encoder(connector, encoder, __i) \
1586 for ((__i) = 0; (__i) < ARRAY_SIZE((connector)->encoder_ids) && \
1587 (connector)->encoder_ids[(__i)] != 0; (__i)++) \
1588 for_each_if((encoder) = \
1589 drm_encoder_find((connector)->dev, NULL, \
1590 (connector)->encoder_ids[(__i)])) \